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' HYDROSTATIC PIPELINE TESTING <br />' Because of the concern about pipe failure and the water release that could <br />result, one final test was also specified, and was performed on the completed <br />pipeline. This was a hydrostatic test, where the pipeline was filled with clean water <br />and pressurized to a pressure higher than the normal operating pressure. This <br />' pressure was maintained for a period of time as specified in the PPI manual. The <br />pipeline pressure held steady during the test, and the pipeline was demonstrated to <br />' be leak-tight and ready for use. <br />The hydrostatic test was actually the ultimate test of the pipeline, much <br />better than visual or even ultrasonic methods, as it demonstrated the pipeline <br />integrity under pressure conditions that exceed normal expected pressures. <br />' The PPI has developed standards for the hydrostatic testing of HDPE pipe, <br />and these standards were followed for the testing of the Climax Storke Pipeline. <br />Hydrostatic testing of the Climax line had not yet been performed at the time the <br />initial draft of this report was written. However, it has since been completed, and <br />the Storke pipeline passed the testing. The results of the hydrostatic testing are <br />included in Appendix C of this report. <br />There are two methods recommended for hydrostatically testing the HDPE <br />pipeline. They are discussed in the PPI manual and are equally valid. One method <br />' allows for a limited land measured) amount of make-up water to be added during <br />the test. The other method uses no make-up water during the final portion of the <br />' test, but allows for a slight drop of pressure in the pipeline as it is tested. <br />' The testing of the Storke pipeline was performed in two phases. This was <br />done because it was necessary to remove a section of the existing water transfer <br />pipe to install the new 24-inch HDPE pipeline, and it was determined that it would <br />be best to verify that the majority of the new pipeline was installed correctly before <br />8 <br />